Officially published by Dyatlov foundation in the form of a book in 2013.
Dyatlov foundation received in 2012 an official copy of the case from the State Archive of the Sverdlovsk Region (ГАСО).
Before that in the 90s several books came out with quotations from the case files (Matveeva, Buyanov, Rakitin)
Prior to that, in 1974, the case was transferred to the State Archive of the Sverdlovsk Region from the archive of the prosecutor's office. In the 80s, some people got an unofficial admission to the case. In 1989, the first unofficial copies were made.